Friction cap for bottles and jars



July 17, 1928. 1,677,253

E. SCOFIELD FRICTION CAP FOR BOTTLEs AND JARS Filed Jan. 28, 1926 INVENTOB Edgar div/Mid Patented July 17, 1928.

UNITED STATES 1,677,253- PATENT OFFICE;-

EDGAR SCOFIELD, OF NEW YORK, N. Y., ASSIGNOR TO ANCHOR CAP AN D CLOSURE COR- PORATION, OF LONG ISLAND CITY; YORK, A CORPORATION OF NEW YORK.

FRICTION CA]? FOR BOTTLES AND JARS.

' Application filed January as, 1926. Serial No. 84,276.

The resent invention relates broadly to cap an jar closures and .more specially to a bottle cap adapted as a dress and -users closure for catsup bottles or'the like.

Heretofore in the art, in the packaging of catsup, chili sauce. and the like, it has been customary to provide a sub tantially permanent closure for packing and shipping, and also a users closure as a dress for the package on the shelves of salesrooms and adapted as a temporary closure for use after the permanent seal has been broken and while the contents of the container is belng used up. The most common type of cap has been that of the screw thread type although friction caps have been proposed. The difficulty with the friction type of caps heretofore used in the art is due to the fact that such caps quickly become loose in use and therefore are impractical.

The present invention overcomes the diffieulties of the known art by provlding a friction type of cap constructed in such manner as to be easily applied and removed and wherein many removals and reapplications do not destroy the resilient character of the cap nor seriously impair its gripping qualities. In the preferred form, the frletion cap of the pre ent invention is adapted to cooperate with a sealing surface on the i container in such manner that the contact between this sealing surface and the cap is a relatively long inclined contact area extending diagonally of the skirt of the cap so that a relatively large portion of the skirt of the cap is available as an elastic area to maintain the required frictional engagement. The cap may be used also on other types of sealing surfaces such as a bulbous finish, taper finish or the like.

It is realized that the invention may be carried out in constructions other than those specifically disclosed in this specification and drawings, and therefore, the disclosure herewith is to be considered as illu trative and not in the limiting sense.

Fig. 1 illustrates the neck of a container showing a cap of the present invention in cross section and illustrating the container as being permanently closed by aclosnre cap of the crown type, a portion of which cap is shown'in section.

Fig. 2 illustrates the preferred form of the cap comprising the present invention.

Fig. 3 is a cross section through the neck of the container and the present cap on line AA, Fig. 1.

Referring now more especially to the drawings, the preferred form of the present lnvention comprises a cap having a cover portion 1, havinga skirt portion 2. The upper portion of the skirt may be slightly is taken' angular-1y inclined as at 4 and the skirt adjacent thetop portion may be knurled to provide a grip for removing the cap. The lower edge of the cap preferably, though not necessarily, may be finished with the well known wire edge 6. The cylindrical portion of the skirt is provided with indenta-' tions 7 having an inclined major portion 8 and circumferential extending portions 9 and 10. Preferably, thee indentations which may be elongated s-shaped locking lugs, are arranged around the cap at substantially diametrically opposite positions as is illustrated in Fig. 3. These indentations are preferably adapted to cooperate with a sealing surface 11 on the mouth of a suitable container 12, and where desired, a substantaally permanent closure such as a crown cap 14 may be used to close the mouth of V the container; and the cap of the present invention is therefore constructed to fit over such permanent closure.

In the formation of glass articles, such *as bottles, defects in the sealing surface are likely to occur on lines parallel tothe axis of the mouth of the container. It will be observed that the line of contact between the friction lugs on the cap and the sealing surface on the container is in its major portion an inclined'line which curves in such manner that the entire bases of the locking lugs are in contact with the sealing surface 11 on a container. The inclined portion has many advantages, for example, its inclined direction overcomes any difliculties which may be encountered by the way of straight line defects on the finish of the glass; it also permits a tigh gripping of the finish by the locking lug because of the fact that a large portion of the skirt of the cap supports the gripping lugs in their function. If the skirt of the cap be cut at right angles to the axis thereof by a plurality of planes, it willbe observed that each one of these planes will cut through a contacting portion of the lug with the sealing surface as is shown in the single cross section illustrated in Fig. 3. The metal in each of these cross sections is effective to maintain the lug, or contacting part at the plane, in contact with the sealefi'ecting sealing force ismaintained when the cap is forced over a sealing finish that has a'slightly larger diameter than the internal measurement between the contacting faces of the locking lugs.

The end portions of the locking lugs present areas which are vertically spaced apart and that circumferentiall bear against the sealing surface. The en portions tend to pull the central portion of the lug tightly against the sealing surface. The action of eachlug from this consideration, is somewhat like that of pulling a piece of wire bent in the form of a distorted S shape against the sealing surface by pulling on each end of the piece of wire in opposite directions around the bottle neck and thereby pulling the central inclined portion tight ly against the sealing surface.

Having dscribed my invention, what I claim is 1. A'closure cap of the friction type comprising a cover portion, a substantially cylindrical skirt depending therefrom, and locking lugs in the skirt of said cap, said lugs having end portions'having a substantially circumferential direction and an intermediate inclined portion joining said end portions.

2. A closure cap of the friction type comprising a cover portion, a substantially cylindrical skirt depending therefrom, looking lugs in the skirt of said cap said lugs having end portions having a su stantially circumferential direction and an intermediate inclined portion joining said end portions, and a reenforcing edge adjacent the lower portion of said lugs.

3. A closure cap of the friction type comprisng a cover portion, a cylindrical skirt, and S-shaped locking lugs 1n the side wall of said skirt. 1 I 4. A closure cap of the friction type com prising a cover portion, a skirt depending therefrom, and &shaped locking lugs in the ing wall, and thus it will be seen that a very side wall of said skirt, and disposed on substantially diametrical sides of said skirt.

.5. A closure cap of the friction type comprising a cover portion, a skirt depending therefrom, locking lugs in said skirt adjacent the lower portion thereof, said lugs comprising indentations with a rounded bottom portion adapted to form a line contact with a substantially cylindrical sealing surface, said line of Contact being of a cir-" cumferential direction on the ends and of a helical direction between said ends. 6. A deep skirt bottle cap comprising a cover portion, a skirt depending therefrom, and locking lugs in said skirt-adjacent the lower portion'thereof formed from indentations having an elongated body with end portions extending at an angle thereto adapted to form a line contact with a substantially cylindrical sealing surface, said line of contact extending circumferentially' and longitudinally of said skirt.

7. A closure cap for bottles comprising a cover portion. a depending skirt, two pairs, of diametrically .disposed locking lugs formed from indentation; inclined at an angle to the cover portion of the cap'to form a helical contact with a cylindrical. sealing zone with the end portions thereof extending in a substantially circumferential direction. I

8. A closure cap comprising a cover portion, a depending skirt, locking lugs in said skirt, said lugs aving an inclined ortion with respect to the coveuportion with the upper end thereof extending in a substantially circumferential direction.

9. A closure cap comprising a cover portion, a depending skirt, locking lugs in said skirt, said lugs having an inclined portion relative to the cover portion with the lower end thereof extending. in a substantially circumferential direction.

EDGAR SCOFIELD. 

